Transtutor is the worst service I have ever used for academic writing and research. Much better off using Fiverr where you can - at least get a reasonable refund when they deliver absolute garbage.
The quality I was delivered was so bad, and the continual revisions were too much to handle and wasted more time than it would take to actually do the work myself.
I asked for a refund because it had gone beyond the point of repair and Cindy from management blatantly refused and replied with a poor response, claiming the quality was satisfactory.
I would not use them if my life depended on it. Stay clear!